Surgery-related weight loss in men reverses testosterone deficiency
Low testosterone levels and symptoms of male sexual dysfunction due to obesity may be reversible with weight loss after bariatric surgery, a new study finds. The results will be presented Saturday at The Endocrine Society's 93rd Annual Meeting in Boston.
"Morbidly obese men have a high prevalence of hypotestosteronenemia, or low testosterone, and of sexual dysfunction," said study co-author Jean-Paul Thissen, MD, PhD, a professor at the University of Louvain in Brussels. "It is reassuring that these problems are potentially curable by weight loss."
This study included 75 obese men who were patients at an obesity clinic between 2007 and 2010. The men had hormone testing, measurements of body fat and assessment by questionnaire of signs of androgen, or male hormone, deficiency. Signs assessed included erectile dysfunction and low sex drive. Among these patients, 17 underwent gastric bypass surgery and were reassessed three and 12 months later.
Initial assessment of the 75 patients showed that 54 had signs and symptoms of androgen deficiency, and 27 had low testosterone levels. The higher the men's body mass index, waist circumference and body fat, the lower their testosterone levels were. "This correlation suggests a potential causal relationship between obesity and low testosterone," Thissen said.
The 17 men who had weight-loss surgery lost an average of 90.2 pounds. One year after surgery, their testosterone levels increased significantly and were within the normal range, showing a reversal of testosterone deficiency, Thissen reported.
Low testosterone levels were not strongly associated with complaints of sexual dysfunction before surgery. However, Thissen said men did not complain of sexual dysfunction after surgery-related weight loss.
Aaron Lohr | EurekAlert!
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...